1321322473 has 2 divisors, whose sum is σ = 1321322474. Its totient is φ = 1321322472.

The previous prime is 1321322417. The next prime is 1321322531. The reversal of 1321322473 is 3742231231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1203534864 + 117787609 = 34692^2 + 10853^2 .

It is an emirp because it is prime and its reverse (3742231231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321322473 - 2⁹ = 1321321961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321322413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660661236 + 660661237.

It is an arithmetic number, because the mean of its divisors is an integer number (660661237).

Almost surely, 2^1321322473 is an apocalyptic number.

It is an amenable number.

1321322473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321322473 is an equidigital number, since it uses as much as digits as its factorization.

1321322473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 28.

The square root of 1321322473 is about 36349.9996286107. Note that the first 3 decimals coincide. The cubic root of 1321322473 is about 1097.3275270298.

The spelling of 1321322473 in words is "one billion, three hundred twenty-one million, three hundred twenty-two thousand, four hundred seventy-three".